An article posted yesterday on sheds some interesting light on the pervasiveness of iTunes. Columnist Verne Gay writes about the obvious fact that television networks regularly cancel shows due to declining ratings. He says that a year ago NBC was about to cancel “The Office,” and then along came iTunes. “And then something providential happened. ABC cut a deal with iTunes’ new TV service, and a few hours later, NBC followed. “The Office” was an immediate iTunes hit. While neither Apple nor NBC release numbers (a million total monthly downloads for all TV shows is one estimate), “The Office” now reigns as the “Seinfeld” of iTunes. While it recently ceded the top spot to “Lost,” most weeks the great NBC comedy is the single most downloaded program.” [Thanks to MacMinute reader Brandon Houston for this news tip.]